Improvement in looms



NO. 34.451. Patented Feu-18, 1862.

UNITED STATES j PATENT OFFICE.

IIVIPROVgENI ENT IN LOOMS.

Specification forming part ofvLetters Patent No. 34,451, dated February18, 1862.

.To all whom it may concern;

Beit known that we, ALBERT SrocxwELL and B. D. HUMES, of Millbury, inthe county of Worcester and State of Massachusetts, have invented newand useful Improvements in Looms; and we do hereby declare that thefollowing is a full and exact description thereof, referencebeinghadtotheaccompanyingdrawings, and to the letters of referencemarked thereon.

Our inventionconsists in a peculiar combination for producing andregulating the tension of the yarn and the delivery of such yarn from orby the yarn-beam, such combination being applied to the lay and apositive take-up motion, and made to operate therewith, substantially ashereinafter specified; also, in the combination of a pawl and rack ortheir mechanical equivalent with the yarn-deliverin g and taking upmachinery, the same being for the purpose of effecting the stoppage ofthe delivery of the yarn, as hereinafter explained.

To enable others skilled in the art to make and use our improvements, wewill proceed to describe their construction and operation.

Figure 1 is an end sectional elevationor View of sufficient of a loom toshow our irnprovements; Fig. 2, a top view of parts of the same; Fig. 3,an end elevation of the loom; Fig. 4 exhibits detached parts of the samewith the beam in position to more perfectly show the mechanism forregulatingthe delivery and tension of the yarn. Fig. 5 is a top View ofthe friction-wheel and spring, to be hereinafter described.

A is the loom-frame; B, the yarn-beam, the latter on one end beingprovided with a wormgear, in which a Worm C engages. This latter isfitted to an upright shaft D by a featherconnection so as to be capableof being slid vertically on the shaft as well as being revolved by it.

Eis a slotted arm or lever having the shaft D for its fulcrum andcarrying two pawls a b for operating a ratcl1et-wheel F.

G is a helical spring arranged between the heel of the pawl b and thetoe of the pawl a,

in order to press the pawls into close contact with the ratchet-wheel- YH is a friction-wheel attached to the shaft l), and being spanned by afurcated springthird arm of such lever K enters a slot in a slide-bar L,arranged as shown in Figs. 1, 2, and 4. A link M connects one end of thebar L with one arm of a right-angular lever N, whose fulcrumis situatednear to the yarnbeam, and so that the arm of the said lever y may restagainst the periphery of the yarn on the beam, as shownin Fig. 4, itbeing pressed against the same by a spring suitably applied to the leverand its fulcrum.

O is a tension-arm pressed by a spring against the adjacent end of theslide L, the same being as shown in Fig. 4.

P is the lay, while S is the draft-pawl resting on the ratchet of thecloth-beam and serving with such ratchet andan operative crank appliedto the crank-shaft of the loom to constitute the usual positive take-upmotion or mechanism.

T is a retainingpawl applied to the said ratchet.

U is a lever pawl or dog placed over a rack of teeth formed in the bar Land held up by a rod jointed to it and the pawl-lever T, the Whole beingas shown in Fig. 1. Whenever the pawl T is raised off its ratchet,either by hand or otherwise, in order to arrest the rotary motion of thecloth-bealn, the pawl or dog U will drop into the teeth on the bar L andstop the let-off at once, although the loom continues to make two orthree picks, which it invariably does.

In the drawings, P denotes the lay, Q the crank-shaft, and R thecam-shaft, they being such as are common to looms for weaving.

To operate the loom, turn the crank-shaft, and as that is connected tothe camshaft by gears it will move the arm that operates the cloth-beamand commence drawing the yarn from the yarn-beam, which will force theworm.

down on the shaft and move the lever J, which moves K, that operates thebar L, which is connected to the slotted arm or leverE, that moves thepawls back on the ratchet-wheel, and as the lay comes back to theposition shown in the drawings it will force the pawls forward,4 andthus turn the worm-shaft, which will turn the yarnbeam,and as the yarnon the'beam decreases in size, with one end of the lever N restingagainst it and the other attached to the link M, which connects it withthe bar L, it will draw the bar toward the centerot' the shaft D andgive more motion to the pawls a and b, and continue to do so as the beamdecreases in size. Consequently the beam will continue to increase itsmotion on its axis as it decreases in size without increasing the motionof the bar L or the worm C up and down on the shaft, and as O is thetensionarm with a spring,r pressing` bard 'against the bar L to `:givethe tension of the yarn, and as the decreasing of the beam'in size drawsthe bar toward the center of the shaftY it draws it away from the centerof the arm O, so that the resistance to the beam lessens as the beamdecreases in size, thereby securing uniform tension and delivery of yarnfrom the beam.

arm O, operated substantially as set forth;

third, the slide-bar L, the rocker-lever E, with its paWl-and-ratchetmechanism, the shaft D,

the levers K J, the movable Worm C and its gear as applied tothe'yarn-beam.

2.` The combination of the pawl U and its rack, with the yarn-deliveringand taking-up mechanisms constructed in manner and so to operate,substantially as specified.

ALBERT. STOCKWELL. B. D. HUMES. Witnesses: i

ELIAS FORBES, J. P, MARSHALL.

